DevExpress MVVM Framework is a set of components helping to work in the Model-View-ViewModel pattern in WPF.
The source code with testing libraries, samples, and documentation is available on GitHub. Click Project Information to go to GitHub.

Most of Codon's functionality is located in this shared code base, which is a .NET Standard library. Features that require platform specific implementation are implemented in respective platform specific packages. In the case of this package, the platform specific packages are: Codon.Android, Codon....

This package consists of a .NET Standard library that provides undo/redo support.
Codon is a zero-dependency cross-platform MVVM framework for creating UWP, WPF, and Xamarin applications. It provides much of what you need to rapidly create sophisticated yet maintainable applications.